Guide LG G8/G8x/v50 Bootloader Unlock and Magisk Root using Firehose

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abrouni

Member
Oct 9, 2015
11
0
The engineering abl is indicated in the first post: abl

I told you, if you flash the abls and don't get to fastboot the problem is you don't have the origional ftm. I told you how to test it now, just use the correct keys to go to recovery. If you can't get to recovery, it means it's the ftm problem.
I did the engineering abls and it didn't work :-(
 

AsItLies

Senior Member
Nov 4, 2009
1,690
616
tucson
Samsung Galaxy S10
I did the engineering abls and it didn't work :-(
you've already said that.

as I've told you, if you have the engineering abls still installed, then flash the original abls back. The phone should then boot normally.

Once back to normal, search for what the key combination is to get to 'recovery', from the phone off position.

If you can't use the key combo and get to recovery, that means you don't have the original ftm partition installed (and it would also be the reason that, even with the engineering abls installed, you can't get to fastboot).

The original ftm partition controls whether those key combos, from the phone off, will work or not.

please don't repeat the same problem over and over. I've answered your question. If you don't understand the answer, read it again, and again, until you do.

good luck
 

frolay

Member
Jul 14, 2022
9
1
Hi I am hoping to root a Verizon variant G820um20j, it’s on android 10. Do I follow just the last steps in the Op’s post under “Verizon LG G8 only” section, or are there more steps? Thanks
 

dscole

New member
Aug 7, 2008
2
1
Android 10 - Model number LM-V50PM - Software Version V450P20n.

I have v50 ThinQ, LM-V450PM, unlocked from Walmart. I need help with Magisk rooting.
At the start of the process, the phone was activated as a Boost (Sprint) device, though my service has ended. After successfully unlocking the boot loader and rooting with Magisk, I installed TWRP via Magisk. TWRP was unable to decrypt the file system, so reinstalled the stock boot_a (I'm on slot a) which worked. I re-rooted and attempted TWRP a second time. Same result.
So I restored the stock boot_a and suddenly my device deactivates from Boost. All the boost software removed.
Since deactivation, every time I try to root by flashing the magisk patched image, the boot hangs at the LG splash screen (formerly the Boost splash screen).
Through EDL I can restore stock boot_a and get the phone back up and working. But I've been unable to make any headway following the Magisk instructions.
I've crc checked abl_a, abl_b, boot_a, and boot_b from before and after the deactivation, no changes there.

Any advise on getting the root back in place?

*edit* I happened upon the thread "Spring LG G8 Bootloader Unlocking and Permanent Root Guide," from 2020.
I that thread it said Android requirements were Android 10 20e and lower. If I'm reading it properly, it looks like my device currently is Android 10 20n. Does this have any bearing on this Magisk hangup?
 
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AsItLies

Senior Member
Nov 4, 2009
1,690
616
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Samsung Galaxy S10
and how can i put twrp?

You have to first find the right twrp for your device, as usual. Then, twrp has to now be 'ram disk injected' into the boot partition. There is no recovery partition anymore.

The easiest way to get it would be to find your specific boot partition with twrp already injected and just copy it to your boot partition. I've found on tele group a forum that has those partitions already. Don't have the name, you'll have to search.
 

viper-101

New member
Jul 5, 2015
4
0
So I am completely stumped.. I would like to perform this guide to unlock my bootloader on my LG g8 thinq the only problem i continuously run into is when i put my phone into EDL mode and connect it to my PC I check the device manager and it comes up as qusb_bulk_cid:xxx_SN:xxxxxxx I have tried everything i can think of to fix this issue... I have installed all of the latest qualcomm drivers, ADB drivers, USB drivers and nothing will correct this for QFIL to be able to pick up my phone and a port that gets assigned to it like (COM1) ect ect. I really hope someone could tell me what im doing wrong and or what im missing please.
 

frolay

Member
Jul 14, 2022
9
1
I’m trying to root a Verizon Lg G8. I read the instructions closer and realized I have to follow all the steps. Yet the Verizon phone doesn’t have the OEM unlock option. I think I saw somewhere a file that can add the OEM unlock option to a Verizon phone, but can’t find that file anymore. Anyways How do I proceed on a version phone without the OEM unlock option? Thanks

Edit – So it looks like the “frp_verizon.img” is the OEM unlock for Verizon.

Another question though. I will like to install TWRP, I saw in another forum these instructions
enter into Fastboot mode and type the following code on the command windows and hit enter.

"adb reboot bootloader"
"fastboot devices"
"fastboot flash recovery_a twrp.img"
"fastboot flash recovery_b twrp.img"
Then reboot in TWRP manually or using a fastboot command
"fastboot oem reboot-recovery"
Or
"fastboot boot twrpname.img"

So, my question will this work?
 
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GenJapis

New member
Sep 12, 2022
1
0
Disclaimer: I am not responsible for any problems from using this guide.
Works for G8, G8s, G8x, and v50
Confirmed working on G8 and v50

Requirements: Android 10

QFIL: https://drive.google.com/file/d/1P7uGjIirqGRdkwlxgKf_idepDlv6_u-q/view?usp=sharing
QFIL Driver: https://drive.google.com/file/d/1sPJm1RuSoVX9JMEs-Gx8xNuEDadO6rpj/view?usp=sharing
LG Mobile Driver:
ADB: https://drive.google.com/file/d/1nvlwaicFpDN_4DGR0BZRWUDgwQwYzOhS/view?usp=sharing
Firehose: https://drive.google.com/file/d/1ekI_d2-P9GdoakkSgk2hK1WHbQLIPlTQ/view?usp=sharing
abl: https://drive.google.com/file/d/1sye4gXsDfD8JVF5qfAMG_GDxSLKY6J6Q/view?usp=sharing

Verizon LG G8 only frp: https://drive.google.com/file/d/1294cXerj2_EkeGw1p38CcVPuyRfdS9N5/view?usp=sharing
This Verizon FRP img was only tested on LG G8 Verizon and is not recommended to be used on other Verizon Variants as it will prevent the phone from booting.

Bootloader Unlock
Unlocking your bootloader will erase all data on your phone

First Install LG Mobile Driver, QFIL driver, and QFIL (Select first option, WWAN)

All Variants other than Verizon: Go to Settings, > System > About Phone > Software Info > Tap Build Number 7 Times.
Go back to Settings > System > Developer Options. Check Enable OEM Unlock


Boot you phone into EDL
You can make sure that your phone is in EDL by plugging your phone to your pc and checking the Device Manager > Ports > Qualcom HS-USB QDLoader 9008 (COM#)
Hold Vol- and Power, when the phone screen turns off to restart begin quickly pressing the vol+ but keep holding vol- and power.
Here is a youtube video of how to boot to EDL:

Open QFIL, Select your Phone's Port, Select Flat Build under Select Build Type, Select the Firehose.elf file under Select Programmer, on the bottom right of QFIL select UFS as the Storage Type.
Click Tools > Partition Manager.
Find Abl_a and right click on it and select Manage Partition Data. Click Read to backup your abl_a.
Go to Windows Explorer and go to C:\Users\Username\AppData\Roaming\Qualcomm\QFIL\COMPORT#
Rename your ReadData_ufs_Lun4.bin to abl_a.bin

Do the same with abl_b, boot_a, and boot_b.
Boot_a and Boot_b is for Magisk Root. Skip if you only want Bootloader Unlock.
Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.

Go back to Partition Manager and right click on abl_a again then select Manage Partition Data, then Select Load and choose the abl engineering file.
Do the same for abl_b.
Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.

Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
Once your phone is in Fastboot it should say
Device State: Locked and Active A/B Slot - _a or _b
remember whichever slot your device says and stay on that slot, you may risk bricking if you change to the other slot. You also need this for Root later.

Extract the ADB.zip
open a Command Prompt and change the directory to the adb folder you just extracted
cd C:\adb
run fastboot devices in that command prompt. it should show "LMG850UM fastboot"

Move the backed up abl_a.bin and abl_b.bin to the adb folder, also frp_verizon.img if you have the verizon LG G8.
Verizon LG G8 only: Run fastboot flash frp frp_verizon.img then fastboot reboot-bootloader

Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
Run fastboot oem unlock
Select Unlock The Bootloader with your arrow keys and press the Power Button
Reboot back to the Bootloader. Unplug your phone, Power off, Hold Vol-, then Plug it in.
Your phone should say Device State – unlocked now


Now fastboot flash abl_a abl_a.bin
and fastboot flash abl_b abl_b.bin
Finish with fastboot reboot
Your Phone Is now Bootloader Unlocked.





Magisk Root
Only do this after you have followed the above guide and have Unlocked your Bootloader.


Magisk
Xda Forum: https://forum.xda-developers.com/f/magisk.5903/
Xda Thread: https://forum.xda-developers.com/t/magisk-the-magic-mask-for-android.3473445/
Github Page: https://github.com/topjohnwu/Magisk


Find the slot you are on from the fastboot bootloader earlier
Go to Windows Explorer and go to C:\Users\Username\AppData\Roaming\Qualcomm\QFIL\COMPORT#
Transfer to your phone the boot_a.bin or boot_b.bin that you backed up in the COMPORT# folder.

Download and install Magisk Manager.
Open Magisk Manager and beside Magisk hit "Install" then "Select and Patch a File" and select the boot_a.bin or boot_b.bin.
After Magisk has patched your boot img you should have magisk_patched#####.img in your phones Download folder.
Transfer it to your PC.

Reboot to EDL
Open QFIL. Click Tools > Partition Manager.
Find the slot you are on from the fastboot bootloader earlier and right click on either boot_a or boot_b and select Manage Partition Data.
Click Load and select the magisk_patched#####.img file you transfered from your phone.
Wait for it to finish then Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.

Reboot to System by holding vol- and power till your phone reboots out of EDL then release both.
Your phone is now Bootloader Unlocked with Magisk Root.






Hopefully this helps.
This guide was written by me, but the information was provided by Cloud1250000.
If there are any errors let me know and I will fix.
What if I have android 9? my lg g8x thinq does not update to android 10. Pls help ty.
 

aadish

Member
Dec 7, 2013
6
1
So I am completely stumped.. I would like to perform this guide to unlock my bootloader on my LG g8 thinq the only problem i continuously run into is when i put my phone into EDL mode and connect it to my PC I check the device manager and it comes up as qusb_bulk_cid:xxx_SN:xxxxxxx I have tried everything i can think of to fix this issue... I have installed all of the latest qualcomm drivers, ADB drivers, USB drivers and nothing will correct this for QFIL to be able to pick up my phone and a port that gets assigned to it like (COM1) ect ect. I really hope someone could tell me what im doing wrong and or what im missing please.
I think you need to do two things to fix that:
1. Make sure to use USB 2.0 ports. QFIL doesn't play well with USB 3.0. If you don't have those then you can use a hub with 2.0 ports or use a VM to emulate those ports

2. Disable driver signature enforcement in Windows temporarily. You should turn it back on after the rooting process
 
Jan 13, 2018
36
0
24
Not sure what I am doing wrong here. Rebooted into fastboot. Yet the damn thing is not showing up under the list unless I exit the boot menu. Real headscratcher right here.
 

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Jan 13, 2018
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Not sure what I am doing wrong here. Rebooted into fastboot. Yet the damn thing is not showing up under the list unless I exit the boot menu. Real headscratcher right here.
Ugh, it STILL isn't showing up in ADP DESPITE giving it the proper drivers.
 

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Jan 13, 2018
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...yet it fragging shows up when it's regularly booted...
 

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Last edited:

AsItLies

Senior Member
Nov 4, 2009
1,690
616
tucson
Samsung Galaxy S10
...yet it fragging shows up when it's regularly booted...
So, under Windows, the driver has to be configured for both ADB, and Fastboot, separately. Don't ask me why, I didn't write that crap os.

And, anywhere in device manager you see an asterisk, when trying to do this, configure that also. If yer still running into issues, try selecting a different driver. From your pictures, it looks like you're selecting the right driver, but it's possible it's corrupted etc, try a diff one just in case.

cheers
 
Jan 13, 2018
36
0
24
So, under Windows, the driver has to be configured for both ADB, and Fastboot, separately. Don't ask me why, I didn't write that crap os.

And, anywhere in device manager you see an asterisk, when trying to do this, configure that also. If yer still running into issues, try selecting a different driver. From your pictures, it looks like you're selecting the right driver, but it's possible it's corrupted etc, try a diff one just in case.

cheers
Literally for the life of me I can't figure it out. I even redownloaded the drives, and still no ****ing dice. I swear to god. Could windows 11 be causing this ****? Tried rebooting phone, rebooting pc, getting into fastboot when in regular boot via commands since it was recognized. Yet as soon as the phone hit fastboot afterwards adb stopped seeing it.




I swear I'm losing my marbles trying to diagnose this crap

WHY DID THEY HAVE TO MAKE IT SO GODDAMN COMPLICATED?!? Oh you have the engineer ALB flashed properly? Instead of having it togglable in the boot menus you need to go through 20 billion steps just to make sure the computer sees it in fastboot!
 
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AsItLies

Senior Member
Nov 4, 2009
1,690
616
tucson
Samsung Galaxy S10
Literally for the life of me I can't figure it out. I even redownloaded the drives, and still no ****ing dice. I swear to god. Could windows 11 be causing this ****? Tried rebooting phone, rebooting pc, getting into fastboot when in regular boot via commands since it was recognized. Yet as soon as the phone hit fastboot afterwards adb stopped seeing it.
Okay, let's be sure to clarify something, when the phone is in 'fastboot mode', adb will not see it. That is not adb mode. The only time adb will see the phone is when it's booted and you've turned on adb debugging in developer options.

If you have twrp, adb will see it then also, but that's a bit more advanced.

Be sure the device is in fastboot and connected, see if you can get drivers installed and the 'fastboot devices' sees the phone.
 

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  • 72
    Disclaimer: I am not responsible for any problems from using this guide.
    Works for G8, G8s, G8x, and v50
    Confirmed working on G8 and v50

    Requirements: Android 10

    QFIL: https://drive.google.com/file/d/1P7uGjIirqGRdkwlxgKf_idepDlv6_u-q/view?usp=sharing
    QFIL Driver: https://drive.google.com/file/d/1sPJm1RuSoVX9JMEs-Gx8xNuEDadO6rpj/view?usp=sharing
    LG Mobile Driver:
    ADB: https://drive.google.com/file/d/1nvlwaicFpDN_4DGR0BZRWUDgwQwYzOhS/view?usp=sharing
    Firehose: https://drive.google.com/file/d/1ekI_d2-P9GdoakkSgk2hK1WHbQLIPlTQ/view?usp=sharing
    abl: https://drive.google.com/file/d/1sye4gXsDfD8JVF5qfAMG_GDxSLKY6J6Q/view?usp=sharing

    Verizon LG G8 only frp: https://drive.google.com/file/d/1294cXerj2_EkeGw1p38CcVPuyRfdS9N5/view?usp=sharing
    This Verizon FRP img was only tested on LG G8 Verizon and is not recommended to be used on other Verizon Variants as it will prevent the phone from booting.

    Bootloader Unlock
    Unlocking your bootloader will erase all data on your phone

    First Install LG Mobile Driver, QFIL driver, and QFIL (Select first option, WWAN)

    All Variants other than Verizon: Go to Settings, > System > About Phone > Software Info > Tap Build Number 7 Times.
    Go back to Settings > System > Developer Options. Check Enable OEM Unlock
    Enable OEM Unlock.jpg


    Boot you phone into EDL
    You can make sure that your phone is in EDL by plugging your phone to your pc and checking the Device Manager > Ports > Qualcom HS-USB QDLoader 9008 (COM#)
    Device Manager - Ports.jpg
    Hold Vol- and Power, when the phone screen turns off to restart begin quickly pressing the vol+ but keep holding vol- and power.
    Here is a youtube video of how to boot to EDL:

    Open QFIL, Select your Phone's Port, Select Flat Build under Select Build Type, Select the Firehose.elf file under Select Programmer, on the bottom right of QFIL select UFS as the Storage Type.
    QFIL.jpg
    Click Tools > Partition Manager.
    Find Abl_a and right click on it and select Manage Partition Data. Click Read to backup your abl_a.
    right click manage partition data.jpg
    Go to Windows Explorer and go to C:\Users\Username\AppData\Roaming\Qualcomm\QFIL\COMPORT#
    Rename your ReadData_ufs_Lun4.bin to abl_a.bin
    change readdata to abl.jpg

    Do the same with abl_b, boot_a, and boot_b.
    Boot_a and Boot_b is for Magisk Root. Skip if you only want Bootloader Unlock.
    abl a and b finished.jpg
    Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.

    Go back to Partition Manager and right click on abl_a again then select Manage Partition Data, then Select Load and choose the abl engineering file.
    Do the same for abl_b.
    Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.

    Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
    If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
    Once your phone is in Fastboot it should say
    Device State: Locked and Active A/B Slot - _a or _b
    remember whichever slot your device says and stay on that slot, you may risk bricking if you change to the other slot. You also need this for Root later.
    Fastboot Bootloader Locked and Slot.jpg

    Extract the ADB.zip
    open a Command Prompt and change the directory to the adb folder you just extracted
    cd C:\adb
    run fastboot devices in that command prompt. it should show "LMG850UM fastboot"

    Move the backed up abl_a.bin and abl_b.bin to the adb folder, also frp_verizon.img if you have the verizon LG G8.
    Move abl a and b to adb folder.jpg
    Verizon LG G8 only: Run fastboot flash frp frp_verizon.img then fastboot reboot-bootloader

    Reboot to Fastboot. Hold Vol- and Power then release power when reboot starts and keep holding vol-
    If that doesn't work unplug and Power off your phone. Hold vol- and plug it in. It should go into fastboot.
    Run fastboot oem unlock
    Select Unlock The Bootloader with your arrow keys and press the Power Button
    BL Unlock NoYes.jpg
    Reboot back to the Bootloader. Unplug your phone, Power off, Hold Vol-, then Plug it in.
    Your phone should say Device State – unlocked now
    Fastboot Bootloader Unlocked and Slot.jpg


    Now fastboot flash abl_a abl_a.bin
    and fastboot flash abl_b abl_b.bin
    Finish with fastboot reboot
    Your Phone Is now Bootloader Unlocked.





    Magisk Root
    Only do this after you have followed the above guide and have Unlocked your Bootloader.


    Magisk
    Xda Forum: https://forum.xda-developers.com/f/magisk.5903/
    Xda Thread: https://forum.xda-developers.com/t/magisk-the-magic-mask-for-android.3473445/
    Github Page: https://github.com/topjohnwu/Magisk


    Find the slot you are on from the fastboot bootloader earlier
    Go to Windows Explorer and go to C:\Users\Username\AppData\Roaming\Qualcomm\QFIL\COMPORT#
    Transfer to your phone the boot_a.bin or boot_b.bin that you backed up in the COMPORT# folder.

    Download and install Magisk Manager.
    Open Magisk Manager and beside Magisk hit "Install" then "Select and Patch a File" and select the boot_a.bin or boot_b.bin.
    After Magisk has patched your boot img you should have magisk_patched#####.img in your phones Download folder.
    Transfer it to your PC.

    Reboot to EDL
    Open QFIL. Click Tools > Partition Manager.
    Find the slot you are on from the fastboot bootloader earlier and right click on either boot_a or boot_b and select Manage Partition Data.
    Click Load and select the magisk_patched#####.img file you transfered from your phone.
    Wait for it to finish then Close Partition Manager. Your phone will reboot to EDL on its own after pressing OK. Wait on that.

    Reboot to System by holding vol- and power till your phone reboots out of EDL then release both.
    Your phone is now Bootloader Unlocked with Magisk Root.






    Hopefully this helps.
    This guide was written by me, but the information was provided by Cloud1250000.
    If there are any errors let me know and I will fix.
    6
    Go back to Partition Manager and right click on abl_a again then select Manage Partition Data, then Select Load and choose the abl engineering file.
    Do the same for abl_b.


    Maybe I'm not catching on to something but, following the guide I don't have a abl_b.bin file besides the one backed up.
    There was a link provided for an abl_a.bin file.
    What am I not understanding?

    Okay I got it this morning. Reread it still didn't understand but had some hunches so check around the net about LG dual sim unlocking and then it clicked. It was meant to say load the engineering file provided into both abl_a and abl_b

    Thanks for the guide maybe rephrase that part. I was super confused for a bit, would never overwrite something with a different name without being super clear.
    6
    Success!

    I have a G8 (LM-G820TM, US T-Mobile variant) that had been updated OTA to Android 11 (G820TM30b). I used Windows 10 Pro 64-bit, version 21H2, on a Dell Latitude E6230 (That shouldn't matter, but is provided for reference).

    Some notes for anyone else doing this, and wisdom I got from more experienced commenters in this thread:

    • Read all the instructions carefully. Read every word slowly. Do what you need to do to make sure you don't skip any steps. If necessary, print out the instructions and cross them off one by one.

    • EDL Mode doesn't show anything on the screen. You'll only know if your phone is in EDL mode if your computer makes a USB Connected chime, and it shows up under Ports in Device Manager.

    • Use a good quality USB 2.0 cable and USB 2.0 port. QFIL is finicky, and doesn't like USB 3 ports. If you get a Sahara error, use a different cable, a different port, or a different computer.

    • When you back up your abl_a and abl_b partitions, they should be about 1MB. (1024KB exactly, in my case). If they're significantly larger, then they didn't read correctly. You'll need to flash them back later, and if they didn't read correctly, you can't restore them.

    • The provided engineering abl_a should be flashed to abl_a and abl_b.

    • The engineering abl should only be used to enable fastboot temporarily so that you can unlock the bootloader. You can't leave it there - you have to flash your original abl_a and abl_b back to your phone once the bootloader is unlocked. If you leave the engineering abl on there, you'll either get a bootloop or your touchscreen won't work.

    • When booting into fastboot for the first time, Windows doesn't use the correct (or any) driver, so the phone just shows up as "Android" in Device Manager, and it doesn't show up when you do "fastboot devices". I had the LG Mobile Driver installed per the instructions, so it was just a matter of pointing Windows at the correct driver. In Windows 10 it was Update Drivers -> Browse my computer for drivers -> Let me pick from a list of available drivers on my computer -> Android -> LGE Mobile ADB Interface
    5
    It should since the abl used is from a g8x and it worked on my v50 sprint.. :)
    4
    Ok, so maybe you unlocked the bootloader, still not sure. But you didn't even root? How do you consider this a success then?

    Well, to answer the first part of your response here are a couple images (jpg type)

    And for the rest of your response, I am going to try to finish out this tutorial this morning. I can say this much in advance: I have found that once a phone has been bootloader unlocked, gaining root (whether it be by magisk, the ol' SuperSU, or whatever) becomes an eventuality of overwhelmingly high likelihood of success. I am saying 'high likelihood' only because I realize that there are never any absolute guarantees in XDA, and it's not a good idea to jinx yourself by getting overconfident. So I'm gonna try to get rooted here and keep my fingers crossed, but I personally can not recall ever hearing of a phone whose bootloader is unlocked, that couldn't be rooted.
    v50thinQ.jpg
    v50thinq2.jpg